十二烷基苯磺酸钠掺杂的聚吡咯的电化学和现场拉曼光谱

Electrochemical and in-situ Raman Spectroscopic Studies of Dodecylbenzenesulfonate Doped Polypyrrole

研究十二烷基苯磺酸根（ＤＢＳ￣－）掺杂的聚吡咯（ＰＰＹ）膜（ＰＰＹ（ＤＢＳ￣－））的循环伏安行为和现场拉曼光谱发现，作为对阴离子的ＤＢＳ￣－可分为两类，一类ＤＢＳ￣－类似于小阴离子，即随ＰＰＹ的氧化还原在膜中自由地嵌脱；另一类ＤＢＳ￣－则始终滞留于ＰＰＹ（ＤＢＳ￣－）膜内，因此当ＰＰＹ还原时，膜内多余的负电荷则由溶液中的Ｎａ￣＋和Ｈ￣＋嵌入膜中来补偿。另外，嵌入膜中的Ｈ￣＋使ＰＰＹ发生了一定程度的质子化。

Polvpyrrole(PPY ) films doped with large organic anion dodecylben-zenesulfonate(DBS￣-)have been studied in detail by cyclic voltammetry and in-situ Raman spec-troscopy. The results reveal that there exist two kinds of DBS￣- doped in the films:(i)DBS￣- candope and undope freely in PPY films during the redox process of PPY, which is similar to thedoping process of small anion;(ii) DBS￣- are always remained inside PPY films.Therefore,forthe reduced PPY films,the negative charges in the films have to be compensated by the incorpo-ration of cations such as Na￣+ or H￣+ from the solution. In addition,H￣+ incorporated.can induce acertain degree of protonation of PPY.